Please help us

I don't know where to put this but there's a member on this site with the email address "Banannegland@hotmail.com" and he has been sending me and my fiance (both members of this site) abusive messages full of foul language and poorly spelt insults. We don't even know who this person is, but we would like to find out and see what his problem is cos if this keeps up, we've been advised to take legal action from someone in that profession.
Any way of finding out who it is and warning them??
Please help us.
Gemma and Marcus

I think your probably right.
It just really started getting to me when i got an email calling Gemma a slag. He had no right to say that, i don't care if he insults my poems but when he starts on Gemma, that's different. Add to the fact he has never met either of us.
But your right, it's petty and i guess there's nothing anyone can really do when it's online.
Thanks
Marcus